lib/gdi/gfbdc.cpp

   1 #include <lib/gdi/gfbdc.h>
   2
   3 #include <lib/base/init.h>
   4 #include <lib/base/init_num.h>
   5
   6 #include <lib/gdi/accel.h>
   7
   8 #include <time.h>
   9
  10 gFBDC::gFBDC()
  11 {
  12         fb=new fbClass;
  13
  14         if (!fb->Available())
  15                 eFatal("no framebuffer available");
  16
  17         surface.clut.data = 0;
  18         setResolution(720, 576); // default res
  19
  20         reloadSettings();
  21 }
  22
  23 gFBDC::~gFBDC()
  24 {
  25         delete fb;
  26         delete[] surface.clut.data;
  27 }
  28
  29 void gFBDC::calcRamp()
  30 {
  31 #if 0
  32         float fgamma=gamma ? gamma : 1;
  33         fgamma/=10.0;
  34         fgamma=1/log(fgamma);
  35         for (int i=0; i<256; i++)
  36         {
  37                 float raw=i/255.0; // IIH, float.
  38                 float corr=pow(raw, fgamma) * 256.0;
  39
  40                 int d=corr * (float)(256-brightness) / 256 + brightness;
  41                 if (d < 0)
  42                         d=0;
  43                 if (d > 255)
  44                         d=255;
  45                 ramp[i]=d;
  46
  47                 rampalpha[i]=i*alpha/256;
  48         }
  49 #endif
  50         for (int i=0; i<256; i++)
  51         {
  52                 int d;
  53                 d=i;
  54                 d=(d-128)*(gamma+64)/(128+64)+128;
  55                 d+=brightness-128; // brightness correction
  56                 if (d<0)
  57                         d=0;
  58                 if (d>255)
  59                         d=255;
  60                 ramp[i]=d;
  61
  62                 rampalpha[i]=i*alpha/256;
  63         }
  64
  65         rampalpha[255]=255; // transparent BLEIBT bitte so.
  66 }
  67
  68 void gFBDC::setPalette()
  69 {
  70         if (!surface.clut.data)
  71                 return;
  72
  73         for (int i=0; i<256; ++i)
  74         {
  75                 fb->CMAP()->red[i]=ramp[surface.clut.data[i].r]<<8;
  76                 fb->CMAP()->green[i]=ramp[surface.clut.data[i].g]<<8;
  77                 fb->CMAP()->blue[i]=ramp[surface.clut.data[i].b]<<8;
  78                 fb->CMAP()->transp[i]=rampalpha[surface.clut.data[i].a]<<8;
  79         }
  80         fb->PutCMAP();
  81 }
  82
  83 void gFBDC::exec(const gOpcode *o)
  84 {
  85         switch (o->opcode)
  86         {
  87         case gOpcode::setPalette:
  88         {
  89                 gDC::exec(o);
  90                 setPalette();
  91                 break;
  92         }
  93         case gOpcode::flip:
  94         {
  95                 if (m_enable_double_buffering)
  96                 {
  97                         gSurface s(surface);
  98                         surface = surface_back;
  99                         surface_back = s;
 100
 101                         fb->setOffset(surface_back.offset);
 102                 }
 103                 break;
 104         }
 105         case gOpcode::waitVSync:
 106         {
 107                 static timeval l;
 108                 static int t;
 109                 timeval now;
 110
 111                 if (t == 1000)
 112                 {
 113                         gettimeofday(&now, 0);
 114
 115                         int diff = (now.tv_sec - l.tv_sec) * 1000 + (now.tv_usec - l.tv_usec) / 1000;
 116                         eDebug("%d ms latency (%d fps)", diff, t * 1000 / (diff ? diff : 1));
 117                         l = now;
 118                         t = 0;
 119                 }
 120
 121                 ++t;
 122
 123                 fb->blit();
 124                 fb->waitVSync();
 125                 break;
 126         }
 127         case gOpcode::flush:
 128                 fb->blit();
 129                 break;
 130         default:
 131                 gDC::exec(o);
 132                 break;
 133         }
 134 }
 135
 136 void gFBDC::setAlpha(int a)
 137 {
 138         alpha=a;
 139
 140         calcRamp();
 141         setPalette();
 142 }
 143
 144 void gFBDC::setBrightness(int b)
 145 {
 146         brightness=b;
 147
 148         calcRamp();
 149         setPalette();
 150 }
 151
 152 void gFBDC::setGamma(int g)
 153 {
 154         gamma=g;
 155
 156         calcRamp();
 157         setPalette();
 158 }
 159
 160 void gFBDC::setResolution(int xres, int yres)
 161 {
 162         if ((m_xres == xres) && (m_yres == yres))
 163                 return;
 164
 165         m_xres = xres; m_yres = yres;
 166
 167         fb->SetMode(m_xres, m_yres, 32);
 168
 169         for (int y=0; y<m_yres; y++)    // make whole screen transparent
 170                 memset(fb->lfb+y*fb->Stride(), 0x00, fb->Stride());
 171
 172         surface.type = 0;
 173         surface.x = m_xres;
 174         surface.y = m_yres;
 175         surface.bpp = 32;
 176         surface.bypp = 4;
 177         surface.stride = fb->Stride();
 178         surface.data = fb->lfb;
 179         surface.offset = 0;
 180
 181         surface.data_phys = fb->getPhysAddr();
 182
 183         int fb_size = surface.stride * surface.y;
 184
 185         if (fb->getNumPages() > 1)
 186         {
 187                 m_enable_double_buffering = 1;
 188                 surface_back.type = 0;
 189                 surface_back.x = m_xres;
 190                 surface_back.y = m_yres;
 191                 surface_back.bpp = 32;
 192                 surface_back.bypp = 4;
 193                 surface_back.stride = fb->Stride();
 194                 surface_back.offset = surface.y;
 195                 surface_back.data = fb->lfb + fb_size;
 196                 surface_back.data_phys = surface.data_phys + fb_size;
 197
 198                 fb_size *= 2;
 199         } else
 200                 m_enable_double_buffering = 0;
 201
 202         eDebug("%dkB available for acceleration surfaces.", (fb->Available() - fb_size)/1024);
 203         eDebug("resolution: %d x %d x %d (stride: %d)", surface.x, surface.y, surface.bpp, fb->Stride());
 204
 205         if (gAccel::getInstance())
 206                 gAccel::getInstance()->setAccelMemorySpace(fb->lfb + fb_size, surface.data_phys + fb_size, fb->Available() - fb_size);
 207
 208         if (!surface.clut.data)
 209         {
 210                 surface.clut.colors = 256;
 211                 surface.clut.data = new gRGB[surface.clut.colors];
 212                 memset(surface.clut.data, 0, sizeof(*surface.clut.data)*surface.clut.colors);
 213         }
 214
 215         surface_back.clut = surface.clut;
 216
 217         m_pixmap = new gPixmap(&surface);
 218 }
 219
 220 void gFBDC::saveSettings()
 221 {
 222 }
 223
 224 void gFBDC::reloadSettings()
 225 {
 226         alpha=255;
 227         gamma=128;
 228         brightness=128;
 229
 230         calcRamp();
 231         setPalette();
 232 }
 233
 234 eAutoInitPtr<gFBDC> init_gFBDC(eAutoInitNumbers::graphic-1, "GFBDC");